/**
* 左边框架结构CSS
*/
.lefter {
  z-index:10;
  float:left;
  width:250px;
  height:100%;
  background-color: #484747;
  overflow: auto;
  .user_info {
    height:150px;
    padding-top: 20px;
  }

  .user {
    width:100px;
    height:100px;
    border-radius: 50px;
    border: 1px solid #292929;
  }

  .user_btn {
    margin-top:30px;
  }
}